serpent-like arms of the brittle star) are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their...

The subphylum includes the class Asteroidea (the starfish), the class Ophiuroidea (the brittle stars and basket stars), and the extinct order Somasteroidea...

mesh of collagen fibres. Historically, taxonomists believed that the Ophiuroidea were sister to the Asteroidea as the clade Asterozoa, or that they were...

Dicyemida Crinoidea (sea lilies and feather stars) Asteroidea (star fish) Ophiuroidea (brittle stars) Echinoidea (sea urchins) Holothuroidea (sea cucumbers)...

marine echinoderms including three classes: Asteroidea: true sea stars Ophiuroidea: brittle stars and basket stars Somasteroidea (sometimes also Stomasteroidea):...

The Melbourne Formation is a geologic formation in Victoria, Australia. It preserves fossils dating back to the Ludlow epoch of the Silurian period. The...

Ophiuroidea Brittle stars Asteroidea Starfish...

The taxonomy and phylogeny of species in the order Euryalida and class Ophiuroidea has been ambiguous and continues to be investigated. Euryalid fossils...

The Nusplingen Limestone (German: Nusplingen Plattenkalk) is a geological formation in Baden-Württemberg, Germany. It preserves fossils dating to the Kimmeridgian...

Echinodermata Subphylum Asterozoa Class Asteroidea (starfish) Class Ophiuroidea (brittle stars) Subphylum Blastozoa † Subphylum Crinozoa (sea lillies...